Encyclopedias

Will present a complete list and description of all bryophytes, pteridophytes, gymnosperms, and angiosperms found in the United States and Canada. Distribution maps and species keys are included. The first volume consists of essays on plant evolution, taxonomy, ethnobotany, and other topics.

Will present a complete list and description of all bryophytes, pteridophytes, gymnosperms, and angiosperms found in the United States and Canada. Distribution maps and species keys are included. The first volume consists of essays on plant evolution, taxonomy, ethnobotany, and other topics.

This USDA database pulls together information from a variety of sources, providing names, distribution data, brief descriptions, images, crop information, and links to other resources. It include "the vascular plants, mosses, liverworts, hornworts, and lichens of the U.S. and its territories."

This USDA database pulls together information from a variety of sources, providing names, distribution data, brief descriptions, images, crop information, and links to other resources. It include "the vascular plants, mosses, liverworts, hornworts, and lichens of the U.S. and its territories."

Lengthy articles with bibliographies. While biased towards animals, there are good overviews of ecological communities of various areas as well as articles on plant ecology. Somewhat lacking in maps and illustrations.

Lengthy articles with bibliographies. While biased towards animals, there are good overviews of ecological communities of various areas as well as articles on plant ecology. Somewhat lacking in maps and illustrations.